129 lines
2.4 KiB
C++
129 lines
2.4 KiB
C++
/*
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* Copyright 2003-2017 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include "ProxyInputStream.hxx"
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#include "tag/Tag.hxx"
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#include "thread/Cond.hxx"
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#include <stdexcept>
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ProxyInputStream::ProxyInputStream(InputStreamPtr _input) noexcept
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:InputStream(_input->GetURI(), _input->mutex, _input->cond),
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input(std::move(_input))
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{
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assert(input);
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}
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ProxyInputStream::~ProxyInputStream() noexcept = default;
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void
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ProxyInputStream::SetInput(InputStreamPtr _input) noexcept
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{
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assert(!input);
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assert(_input);
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input = std::move(_input);
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/* this call wakes up client threads if the new input is
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ready */
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CopyAttributes();
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}
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void
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ProxyInputStream::CopyAttributes()
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{
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assert(input);
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if (input->IsReady()) {
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if (!IsReady()) {
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if (input->HasMimeType())
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SetMimeType(input->GetMimeType());
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size = input->KnownSize()
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? input->GetSize()
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: UNKNOWN_SIZE;
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seekable = input->IsSeekable();
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SetReady();
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}
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offset = input->GetOffset();
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}
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}
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void
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ProxyInputStream::Check()
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{
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if (input)
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input->Check();
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}
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void
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ProxyInputStream::Update() noexcept
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{
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if (!input)
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return;
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input->Update();
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CopyAttributes();
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}
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void
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ProxyInputStream::Seek(offset_type new_offset)
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{
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while (!input)
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cond.wait(mutex);
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input->Seek(new_offset);
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CopyAttributes();
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}
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bool
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ProxyInputStream::IsEOF() noexcept
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{
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return input && input->IsEOF();
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}
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std::unique_ptr<Tag>
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ProxyInputStream::ReadTag()
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{
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if (!input)
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return nullptr;
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return input->ReadTag();
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}
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bool
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ProxyInputStream::IsAvailable() noexcept
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{
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return input && input->IsAvailable();
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}
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size_t
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ProxyInputStream::Read(void *ptr, size_t read_size)
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{
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while (!input)
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cond.wait(mutex);
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size_t nbytes = input->Read(ptr, read_size);
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CopyAttributes();
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return nbytes;
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}
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